More stuff from the Sun rescue

Dave McGuire mcguire at
Tue Oct 30 19:10:55 CDT 2007

On Oct 30, 2007, at 10:19 AM, Sridhar Ayengar wrote:
>>> There's also many boards for a (can't remember the name, it starts 
>>> with "T" and is the ultra-high-reliability system that runs 2 or 4 
>>> processors in parallel. Think it's PA-RISC, but can't recall for 
>>> sure). I don't have them, but can pick them up tomorrow if anyones 
>>> interested.
>>   Tandem?  If so, those will almost definitely be MIPS processors.
> Refresh my memory how those worked?  Two processors in lock-step?  
> Three processors in a voting quorum?

   I don't know which machines are which, but the ones Doug Humphrey 
showed me (when he worked at Tandem) used three R3000 processors in a 
voting system.  It was very impressive.


Dave McGuire
Port Charlotte, FL

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